Particle Plugging Test(The particle-plugging test (PPT) often is used to evaluate the ability of plugging particles added to a fluid to mitigate formation damage by stopping or slowing filtrate invasion into a core. ixtra)
Pressure Penetration Test(Shale Permeability using the Pressure Penetration Test (PPT). Pressure penetration technique (PPT) tests have been performed to investigate the effect of physical plugging by nanoparticles. Using this technique, we measure the permeability of shale samples in contact with various kinds of fluids: brine, base mud, and base mud with various concentrations of nanoparticles. ixtra)
slot test(The slot test gives an indication of the ability of a lost circulation material plug to withstand pressure. Since formation breakdown can occur before the average seal with blowout, this test is not as indicative of a lost circulation materials effectiveness or merits as wedge or sphere test. ixtra)